Hesperocyparis arizonica, the Arizona cypress, is a North American species of tree in the cypress family Cupressaceae, native to the southwestern United States and Mexico. Populations may be scattered rather than in large, dense stands.
Packera is a genus of about 75 species of plants in the daisy family, Asteraceae. Most species are commonly called ragworts or grounsels. Its members were previously included in the genus Senecio, but were moved to a different genus based on chromosome numbers, a variety of morphological characters, and molecular phylogenetic evidence.
Adolphia is a genus of shrubs in the buckthorn family containing only two species.
Paul Carpenter Standley was an American botanist known for his work on neotropical plants.
Nelsonianthus is a genus of flowering plants belonging to the family Asteraceae.
Viscainoa is a genus of flowering plants belonging to the family Zygophyllaceae. It is also in the subfamily of Morkillioideae.
Torralbasia is a monotypic genus of flowering plants belonging to the family Celastraceae. It only contains the one known species, Torralbasia cuneifolia(C.Wright ex A.Gray) Krug & Urb.
Dayia is a genus of flowering plants belonging to the family Polemoniaceae.
Suckleya is a monotypic genus of flowering plant belonging to the family Amaranthaceae. It only contains one known species, Suckleya suckleyana(Torr.) Rydb.
Lackeya is a genus of flowering plants in the legume family, Fabaceae. It contains two species native to North America.
Lundia is a genus of flowering plants belonging to the family Bignoniaceae.
Stimpsonia is a genus of flowering plants belonging to the family Primulaceae.
Seymeria is a genus of flowering plants belonging to the family Orobanchaceae.
Pennellia is a genus of flowering plants belonging to the family Brassicaceae.
Sidneya is a genus of flowering plants belonging to the family Asteraceae.
Helmontia is a genus of flowering plants belonging to the family Cucurbitaceae.
Hunzikeria is a genus of flowering plants belonging to the family Solanaceae.
Hanburia is a genus of plants in the tribe Sicyoeae of the gourd family, Cucurbitaceae. Its native range is from Mexico to Venezuela and Peru. It is found in the countries of Colombia, Costa Rica, Ecuador, Guatemala, Honduras, Mexico, Panamá, Peru and Venezuela.
Hullsia is a genus of flowering plants in the family Asteraceae. It only contains one species, Hullsia argillicola.
Ibervillea sonorae is a tuberous perennial plant in the Cucurbitaceae family known by the common names wereke, wareque, guarequi, and coyote melon. It is a highly variable species characterized by a large, succulent tuberous root, which in the dry sand of its native habitat resembles a gray, dust-covered boulder. Emerging from the root yearly are long, flexible liana-like shoots, which reach a length of three or more meters. This species is native to northwestern Mexico, being found in the states of Baja California, Baja California Sur, Sonora and Sinaloa.
